Why did moving the mouse cursor cause Windows 95 to run more quickly?

That reminded me of something. When I was young, if I remember correctly, Windows 95 (if not 98) had this weird behavior that when installing programs, wiggling the mouse cursor make the progress faster. What caused this? I googled for it, I couldn't find anything related. I had no idea this was a thing, and the explanation for it" Makes sense, strangely enough.